WO2020189917A1

WO2020189917A1 - Method for establishing implant placement plan using implant centerline, and dental image processing apparatus therefor

Info

Publication number: WO2020189917A1
Application number: PCT/KR2020/002896
Authority: WO
Inventors: 최규옥; 이도현; 정진아; 이응준
Original assignee: 오스템임플란트 주식회사
Priority date: 2019-03-19
Filing date: 2020-02-28
Publication date: 2020-09-24
Also published as: KR102239358B1; KR20200113039A

Abstract

Disclosed are a method for establishing an implant placement plan using an implant centerline, and a dental image processing apparatus therefor. The method for establishing an implant placement plan according to one embodiment comprises the steps of: acquiring dental image data; and performing a simulation of implant placement by determining a position and an angle of an implant to be placed on the basis of relationship information between occlusal teeth and surrounding structures including a state of an alveolar bone, with respect to the acquired dental image data.

Description

Implant placement plan establishment method using implant centerline and dental image processing device for the same

The present invention relates to a dental image processing technology including a guide design technology for dental implant surgery.

In the procedure of implant surgery using software, after establishing an implant placement plan in consideration of the patient's anatomical structure on the software, implant surgery is performed. In the process of establishing an implant placement plan using software, the position of the crown for each tooth number to be operated on is first determined, and the initial placement position of the implant is determined on the same axis as the reference axis of the crown. After that, it is based on a method of determining the final position through user adjustment.

Accordingly, the software determines and provides the initial position of the implant only on the same axis as the crown reference axis, and other tasks are manually corrected by the user to determine the final position of the implant. It is difficult to obtain accurate simulation results as more manual work by users increases. In addition, there is a problem that the specifications of the implant vary depending on the placement angle.

According to an embodiment, a method for establishing an implant placement plan and a dental image processing apparatus for the same is proposed, which guides an implant placement angle to enable accurate and automatic implant placement.

An implant placement plan establishment method according to an embodiment includes the steps of acquiring dental image data, and an implant to be placed based on relationship information between the occlusal teeth and surrounding structures including the state of the alveolar bone for the acquired dental image data. It includes the step of performing a simulation of placing the implant by determining the position and angle of the.

Acquiring dental image data includes generating a panoramic image from CT data or oral model data of a patient, performing tooth segmentation on the panoramic image to separate tooth regions, and It may include determining a predetermined tooth region in which the implant is to be placed among the tooth regions, and generating a cross-sectional image based on a center of a long axis of the determined tooth region.

The steps of performing the simulation include extracting the outlines of the teeth and alveolar bones from the dental image, generating the implant centerline based on the outlines of the extracted teeth and alveolar bones, and placing the implant along the created implant centerline. It may include steps.

The step of generating the implant center line includes: when the target tooth to be implanted is a natural tooth of the mandible, generating the center line of the implant to face the lingual cusp of the maxillary antagonist extracted based on the extracted alveolar bone of the mandible, and the target tooth In the case of the natural teeth of the maxilla, generating the centerline of the implant toward the buccal cusps of the extracted lower antagonist based on the extracted alveolar bone of the maxilla may be included.

The step of generating the implant center line includes setting a predetermined point on the lingual cusp from the outline of the extracted opposing tooth when the target tooth to be implanted is a damaged tooth, and a predetermined point at the center point of the outline of the extracted alveolar bone. It may include the step of setting and generating an implant center line connecting the lingual cusp point of the set opposing tooth and the central point of the alveolar bone.

The step of performing the simulation includes determining and providing the initial position of the implant so that it is located at the center of the crown with the same central axis based on the central axis of the crown, and relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone. The step of grasping and the step of determining and providing the final position of the implant by modifying the initial position of the implant by reflecting the determined relationship information with the surrounding structure.

A dental image processing apparatus according to another embodiment includes a data acquisition unit for acquiring dental image data, and an implant to be placed based on relationship information between an occlusal tooth and a surrounding structure including a state of an alveolar bone for the acquired dental image. And a control unit that performs a simulation to determine the position and angle of the dental implant, and an output unit that places an implant whose position and angle is determined in the dental image and displays it on a screen.

The control unit includes a data processing unit that processes the acquired dental image data to generate a cross-sectional image, an outline extraction unit that extracts outlines of teeth and alveolar bones from the cross-sectional image, and an implant center line based on the outlines of the extracted teeth and alveolar bones. It may include a center line generating unit for generating a, and an implant placement unit for placing the implant along the generated implant center line.

The data processing unit generates a panoramic image from the patient's CT data or oral model data, separates tooth regions by performing tooth segmentation on the panoramic image, and places an implant from among the separated tooth regions. The tooth region of is determined, and a cross-sectional image can be generated based on the center of the long axis of the determined tooth region.

The center line generator generates the center line of the implant to face the lingual cusp of the maxillary antagonist extracted based on the extracted alveolar bone of the mandible, and the target tooth is the natural teeth of the maxilla when the target tooth for implant placement is a natural tooth of the mandible. , The center line of the implant can be created to face the buccal cusps of the lower antagonist extracted based on the extracted alveolar bone of the maxilla.

The center line generation unit sets a predetermined point on the lingual cusp from the outline of the extracted antagonist when the target tooth to be implanted is a damaged tooth, sets a predetermined point at the center point of the outline of the extracted alveolar bone, and An implant centerline can be created that connects the lingual cusp point of the congruence and the central point of the alveolar bone.

According to a method for establishing an implant placement plan and a dental image processing apparatus therefor according to an embodiment, when establishing an implant placement plan through simulation, the state of the antagonist and alveolar bone is reflected to guide the placement angle of the implant accurately and automatically. Implant placement is possible.

1 is a view showing the configuration of a dental image processing apparatus according to an embodiment of the present invention,

2 is a diagram showing a detailed configuration of the control unit of FIG. 1 according to an embodiment of the present invention;

3 is a view showing a panoramic image divided into a plurality of tooth regions according to an embodiment of the present invention;

4 is a view showing a cross-sectional image generated based on a determined tooth region according to an embodiment of the present invention;

5 is a diagram illustrating an example of extracting outlines of teeth and alveolar bone from a cross-sectional image according to an embodiment of the present invention;

6 and 7 are views showing cross-sectional images showing an example of generating an implant center line based on an extracted outline according to an embodiment of the present invention;

8 is a diagram showing a cross-sectional image showing an example of generating an implant center line based on an extracted outline according to another embodiment of the present invention;

9 is a view showing a cross-sectional image in which an implant is placed along an implant center line according to an embodiment of the present invention;

10 is a view showing a method of establishing an implant placement plan according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

In describing embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted, and terms to be described later are in the embodiments of the present invention. These terms are defined in consideration of the function of the user and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

Combinations of each block in the attached block diagram and each step in the flowchart may be executed by computer program instructions (execution engines), and these computer program instructions are provided on a processor of a general purpose computer, special purpose computer or other programmable data processing device. As it may be mounted, its instructions executed by the processor of a computer or other programmable data processing device generate means for performing the functions described in each block of the block diagram or each step of the flowchart.

These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing device to implement a function in a particular way, so that the computer usable or computer readable memory It is also possible to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flow chart.

In addition, since computer program instructions can be mounted on a computer or other programmable data processing device, a series of operation steps are performed on a computer or other programmable data processing device to create a computer-executable process. It is also possible for the instructions to perform the data processing apparatus to provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or each step may represent a module, segment, or part of code containing one or more executable instructions for executing specified logical functions, and in some alternative embodiments mentioned in the blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially simultaneously, and the blocks or steps may be performed in the reverse order of a corresponding function as necessary.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the present invention are provided to more fully describe the present invention to those of ordinary skill in the art to which this invention pertains.

1 is a diagram showing the configuration of a dental image processing apparatus according to an embodiment of the present invention.

The dental image processing apparatus 1 is an electronic device capable of executing a dental image processing program such as a guide design program for dental implant surgery. Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smartphones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like. In addition to the guide design program, dental image processing programs include scan programs and CAD programs. In addition, it can be applied to programs for general medical image processing other than for dental implant surgery.

The image processing process using a dental image processing program includes registration of a surgical patient, acquisition of CT data and oral model data of the registered patient, registration of CT data and oral model data, generation of arch lines from CT data or oral model data, and arch lines. It consists of a series of processes including creating a panoramic image using, determining the position and size of the crown model from the patient's oral model data, determining the position of the implant structure from the patient's CT data, designing the guide shape, and outputting the final guide.

The present invention corresponds to a process in which a cross-sectional image is generated from CT data or a panoramic image of a patient, and an implant placement angle is determined from the generated cross-sectional image and is automatically placed. Hereinafter, the configuration of the dental image processing apparatus 1 having the above-described characteristics will be described later.

Referring to FIG. 1, a dental image processing apparatus 1 according to an embodiment includes a data acquisition unit 10, a storage unit 12, a control unit 14, an input unit 16, and an output unit 18. .

The data acquisition unit 10 acquires image data from a patient. Image data necessary for implant placement include CT data and oral model data. The data acquisition unit 10 may execute CT data and oral model data in a program or load data stored in a web page and a server.

The oral model data is data with information on actual teeth including damaged teeth. The oral model data may be obtained by scanning a plaster model created after a patient's mouth with a 3D scanner. As another example, it may be obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner. The obtained oral model data may be stored in the storage unit 12.

CT data can be obtained by generating a patient's head tomography images using computed tomography (CT), segmenting the boundary of the tooth from each tomography image, and then combining them into one. These oral model data and CT data are images obtained by photographing the maxillary teeth under the maxillary teeth with the patient's mouth open, the image obtained by photographing the mandibular teeth above the mandibular teeth with the mouth open, and the local area with the mouth closed. Includes images obtained, oral radiographs, etc. The acquired CT data may be stored in the storage unit 12.

The storage unit 12 stores various data such as information necessary for performing an operation of the dental image processing apparatus 1 and information generated according to the operation. In the storage unit 12 according to an embodiment, oral model data and CT data of an individual patient are stored, and user request for oral model data and CT data of a specific patient among all oral model data and CT data during dental treatment simulation. It can be provided to the control unit 14 according to. At this time, the storage unit 12 stores images of the upper and lower teeth of an individual patient, and images of the upper and lower teeth that match the oral model data and CT data of a specific patient are stored at the user request. Accordingly, it can be provided to the control unit 14.

The control unit 14 controls each component while establishing an implant placement plan through control by a computer program. The control unit 14 manages screen information displayed on the screen through the output unit 18, and performs a simulation of placing a virtual implant object on the dental image. A dental image in which a virtual implant object is placed refers to a multidimensional image, such as 2D or 3D, that shows the patient's tooth arrangement created to establish an implant surgery plan. Various types of images, such as X-ray, CT, MRI, panoramic images, oral scan images, images generated through reconstruction, and images that match multiple images, can be used for implant surgery planning.

According to an embodiment, the control unit 14 acquires CT data and oral model data of a patient, matches the CT data and oral model data, generates an arch line from the registration data, and uses the arch line to create a panoramic view. Create a panoramic image. Then, from the generated panoramic image, the panoramic image is segmented into tooth regions for each tooth number so that the user can select a tooth region for treatment or surgery. In this case, the tooth regions divided in the panoramic image may be displayed on the screen as a virtual object (for example, in the form of a box). The user selects a target tooth for surgery or treatment while checking the virtual object displayed on the screen. The target tooth selected in the panoramic image may be used as a tooth to place an implant structure.

After selecting a tooth area to be treated or operated in the panoramic image, the controller 14 determines the position and size of the crown model through simulation in the panoramic image, determines the position and angle of the implant, design the guide shape, and outputs the final guide. do.

The controller 14 according to an embodiment performs a simulation by determining the position and angle of the implant to be placed based on the relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone on the acquired dental image.

The control unit 14 according to an embodiment determines and provides the initial position of the implant to be located at the center of the crown with the same central axis based on the central axis of the crown, and relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone. To grasp. In addition, the final position of the implant is determined and provided by modifying the initial position of the implant by reflecting the identified relationship information with the surrounding structures. The detailed configuration of the control unit 14 will be described later with reference to FIG. 2.

The input unit 16 receives a user manipulation signal. For example, when implantation information is determined by the control unit 14 and the image data including the implant displayed on the screen through the output unit 18, a user operation for fine adjustment is input and the implant position and angle are input. Can be adjusted.

The output unit 18 displays a screen. At this time, the output unit 18 displays the image data on the screen. Image data includes a CT image, a panoramic image reconstructed through a CT image, and a CT cross-section image generated from a panoramic image. In addition, the output unit 18 displays the implant placement result through simulation on an image in the screen.

2 is a diagram showing a detailed configuration of the control unit of FIG. 1 according to an embodiment of the present invention.

1 and 2, the control unit 14 includes a data processing unit 140, an outline extraction unit 142, a center line generation unit 144, and an implant placement unit 146.

The data processing unit 140 processes the dental image data acquired through the data acquisition unit 10 to generate a cross-sectional image. For example, the data processing unit 140 generates a panoramic image from CT data or oral model data of a patient, and divides the panoramic image into tooth regions for each tooth number. Subsequently, among the divided tooth regions, a tooth region in which an implant is to be placed is determined, and a CT cross-sectional image is generated based on the center of a major axis of the determined tooth region. An embodiment of this will be described later with reference to FIGS. 3 and 4.

The outline extracting unit 142 extracts outlines of teeth and alveolar bone from the cross-sectional image generated through the data processing unit 140, respectively. For example, the outlines of teeth and alveolar bones are extracted according to whether they have a predetermined HU value using the Hounsfield Unit (HU, hereinafter referred to as'HU') of the cross-sectional image. An embodiment of this will be described later with reference to FIG. 5.

The center line generation unit 144 generates an implant center line based on the outlines of teeth and alveolar bones extracted through the outline extraction unit 142. For example, the center line generation unit 144 generates an implant center line to face the lingual cusp of the maxillary antagonist extracted from the outline extraction unit 142 when the target tooth to be implanted is a natural tooth of the mandible. When the target tooth is a natural tooth of the maxilla, the center line of the implant is generated so as to face the buccal cusp of the lower antagonist extracted by the outline extraction unit 142. An embodiment of this will be described later with reference to FIGS. 6 and 7, respectively.

As another example, when the target tooth is a damaged tooth, the center line generator 144 sets a predetermined point on the lingual cusp from the outline of the extracted opposing tooth. Then, a predetermined point is set at the central point of the outline of the extracted alveolar bone. Thereafter, an implant center line connecting the lingual cusp point of the set antagonist and the center point of the alveolar bone is created. An embodiment of this will be described later with reference to FIG. 8.

The implant placement unit 146 places the implant along the center line of the implant generated through the center line generation unit 144. An embodiment of this will be described later with reference to FIG. 9.

3 is a diagram illustrating a panoramic image divided into a plurality of tooth regions according to an embodiment of the present invention.

1 and 3, the dental image processing apparatus 1 generates an arch line from a CT image or oral data, and reconstructs a panoramic image 3 using the generated arch line. Then, tooth segments 30 are separated by performing tooth segmentation on the panoramic image 3. Then, a predetermined tooth region 32 in which an implant is to be placed is determined among the separated tooth regions 30. The tooth area 32 in which the implant is to be placed may be set by the user. For example, on the panoramic image screen, the tooth region at the position indicated by the cursor is selected by the user's mouse operation.

4 is a diagram illustrating a cross-sectional image generated based on a determined tooth region according to an embodiment of the present invention.

1 and 4, the dental image processing apparatus 1 includes a center 320 of the long axis of a predetermined tooth region 32 in which an implant is to be placed among tooth regions in the panoramic image 3 The CT cross-section image (4) is generated based on. CT cross-sectional images 4 are generated in the same way for the maxilla and mandible.

5 is a diagram illustrating an example of extracting outlines of teeth and alveolar bone from a cross-sectional image according to an embodiment of the present invention.

1 and 5, the dental image processing apparatus 1 extracts the

outlines

412 and 422 of the

alveolar bones

410 and 420 from the cross-sectional image 4 and the outline 432 of the teeth 430, respectively. . The

alveolar bones

410 and 420 are portions protruding from the maxilla (maxilla) and mandible (lower jaw), respectively, and serve to support the teeth. The hard tissue including the

alveolar bones

410 and 420 and the teeth 430 has a predetermined HU value or more. At this time, the

alveolar bones

410 and 420 and the teeth 430 each have their own HU values, and the outlines of regions having similar (same or within a range within a preset value) HU values are clustered. Can be extracted. For example, the tooth outline 432 is extracted according to the HU value of the tooth 430, and the alveolar bone outlines 412 and 422 are extracted according to the HU value of the

alveolar bones

410 and 420, respectively.

6 and 7 are diagrams showing cross-sectional images showing an example of generating an implant center line based on an extracted outline according to an embodiment of the present invention.

1 and 6, in a cross-sectional image, when the target tooth to be implanted is a natural tooth of the mandible, the dental image processing apparatus 1 is a maxillary antagonist extracted based on the extracted alveolar bone 620 of the mandible. The implant center line 610 is created to face the lingual cusp 612 of 610.

Referring to FIGS. 1 and 7, in a cross-sectional image, when the target tooth for implant placement is a natural tooth of the maxilla, the lower antagonist tooth extracted based on the extracted alveolar bone 720 of the maxillary The implant centerline 710 is created to face the buccal cusp 712 of 710.

8 is a diagram illustrating a cross-sectional image showing an example of generating an implant center line based on an extracted outline according to another embodiment of the present invention.

1 and 8, the dental image processing apparatus 1 includes a predetermined point 850 on the lingual cusp in the outline of the extracted opposing tooth 830 in the case where the target tooth to be implanted is a damaged tooth in a cross-sectional image. ) Is set. Then, a predetermined point 840 is set at a central point of the outline of the extracted alveolar bone 820. Subsequently, an implant center line 860 connecting the lingual cusp point 850 of the set antagonist tooth and the alveolar bone center point 840 is generated.

In the example of FIG. 8, it is assumed that a patient has a missing mandibular molar, and the implant center line 860 is directed toward the lingual cusp of the maxillary molar 850. Accordingly, the center 840 of the outline of the extracted mandibular alveolar bone 840 and the lingual cusp point 8580 of the maxillary molar tooth 830 are connected to generate the implant center line 860.

9 is a view showing a cross-sectional image in which an implant is placed along an implant center line according to an embodiment of the present invention.

1 and 9, the dental image processing apparatus 1 places the implant 900 along the generated center line 860. Accordingly, when the implant 900 is placed, since the implant 900 is automatically placed by automatically considering the angle from the buccal point of view, inconvenience and inaccuracies that occur when the user manually places can be solved. .

1 and 10, the dental image processing apparatus 1 acquires dental image data (S1010). In the dental image data acquisition step (S1010 ), the dental image processing apparatus 1 according to an exemplary embodiment generates a panoramic image from CT data or oral model data of a patient. Then, tooth regions are separated by performing tooth segmentation on the panoramic image. Then, a predetermined tooth region in which an implant is to be placed is determined among the separated tooth regions, and a cross-sectional image is generated based on the center of the long axis of the determined tooth region.

Subsequently, the dental image processing apparatus 1 grasps relational information between the occlusal teeth and surrounding structures including the state of the alveolar bone with respect to the acquired dental image data (S1020). For example, tooth and alveolar bone regions are extracted from a cross-sectional image, and outlines of the extracted tooth and alveolar bone regions are extracted, respectively.

Subsequently, the dental image processing apparatus 1 determines the position and angle of the implant to be placed based on the determined relationship information with the surrounding structures (S1030). For example, an implant center line is created based on the outline of the extracted tooth and alveolar bone.

One of the methods of generating an implant center line is to generate an implant center line to face the lingual cusp of the maxillary antagonist extracted based on the extracted alveolar bone of the mandible when the target tooth to be implanted is a natural tooth of the mandible. As another example, when the target tooth is a natural tooth of the maxilla, the center line of the implant is generated so as to face the buccal cusps of the extracted lower opposing tooth based on the extracted alveolar bone of the maxilla.

As another example, when the target tooth to be implanted is a damaged tooth, a predetermined point is set on the lingual cusp at the outline of the extracted opposing tooth. Then, a predetermined point is set at the central point of the outline of the extracted alveolar bone. Subsequently, an implant center line connecting the lingual cusp point of the set antagonist and the center point of the alveolar bone is created.

Subsequently, the dental image processing apparatus 1 performs a simulation of placing an implant (S1040). For example, the implant is placed along the center line of the created implant.

The dental image processing apparatus 1 according to an embodiment determines and provides the initial position of the implant to be located at the center of the crown with the same central axis with respect to the central axis of the crown, and then provides the surrounding structures including the state of the occlusal teeth and the alveolar bone. The final position of the implant is determined and provided by revising the initial position of the implant by reflecting the relationship information with the identified surrounding structures by grasping the relationship information with

So far, the present invention has been looked at around the embodiments. Those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims

Obtaining dental image data; And

Performing a simulation of placing the implant by determining the position and angle of the implant to be placed based on the relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone on the acquired dental image data;

Implant placement plan establishment method comprising a.
The method of claim 1, wherein obtaining the dental image data

Generating a panoramic image from CT data or oral model data of the patient;

Separating tooth regions by performing tooth segmentation on the panoramic image;

Determining a predetermined tooth region in which the implant is to be placed from among the separated tooth regions; And

Generating a cross-sectional image based on the center of the long axis of the determined tooth region;

Implant placement plan establishment method comprising a.
The method of claim 1, wherein performing the simulation

Extracting the outlines of the teeth and the alveolar bone from the dental image, respectively;

Generating an implant centerline based on the extracted tooth and the outline of the alveolar bone; And

Placing an implant along the created implant center line;

Implant placement plan establishment method comprising a.
The method of claim 3, wherein the step of generating the implant centerline

Generating an implant centerline so as to face the lingual cusp of the extracted maxillary antagonist based on the extracted alveolar bone of the mandible when the target tooth for implant placement is a natural mandible tooth; And

If the target tooth is a natural tooth of the maxilla, generating an implant centerline so as to face the buccal cusps of the extracted lower antagonist based on the extracted alveolar bone of the maxilla;

Implant placement plan establishment method comprising a.
The method of claim 3, wherein generating the implant centerline

Setting a predetermined point on the lingual cusp at the outline of the extracted opposing tooth when the target tooth to be implanted is a damaged tooth;

Setting a predetermined point at a central point of an outline of the extracted alveolar bone; And

Generating an implant center line connecting the lingual cusp point of the set antral tooth and the central point of the alveolar bone;

Implant placement plan establishment method comprising a.
The method of claim 1, wherein performing the simulation

Determining and providing an initial position of the implant to be located at the center of the crown with the same central axis with respect to the central axis of the crown;

Determining relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone; And

Determining and providing a final position of the implant by modifying the initial position of the implant by reflecting the determined relationship information with the surrounding structures;

Implant placement plan establishment method comprising a.
A data acquisition unit for obtaining dental image data;

A control unit for performing a simulation for determining the position and angle of the implant to be placed based on the relationship information between the occlusal teeth and the surrounding structures including the state of the alveolar bone on the acquired dental image; And

An output unit for placing an implant whose position and angle is determined in the dental image and displaying it on a screen;

Dental image processing apparatus comprising a.
The method of claim 7, wherein the control unit

A data processing unit that processes the acquired dental image data to generate a cross-sectional image;

An outline extraction unit for extracting outlines of teeth and alveolar bones from the cross-sectional image, respectively;

A center line generator for generating an implant center line based on the extracted tooth and alveolar bone outlines; And

An implant placement unit for placing an implant along the generated implant center line;

Dental image processing apparatus comprising a.
The method of claim 8, wherein the data processing unit

A panoramic image is generated from the patient's CT data or oral model data, tooth segmentation is performed on the panoramic image to separate tooth regions, and a predetermined tooth region for implantation among the separated tooth regions And generating a cross-sectional image based on the center of the long axis of the determined tooth region.
The method of claim 8, wherein the center line generator

When the target tooth for implant placement is a natural tooth of the mandible, an implant centerline is created to face the lingual cusp of the extracted maxillary antagonist based on the extracted mandible alveolar bone,

When the target tooth is a natural tooth of the maxilla, an implant centerline is generated to face the buccal cusps of the extracted lower antagonist based on the extracted alveolar bone of the maxilla.
The method of claim 8, wherein the center line generator

If the target tooth for implant placement is a damaged tooth, a predetermined point is set on the lingual cusp at the outline of the extracted opposing tooth,

A predetermined point is set at the central point of the outline of the extracted alveolar bone,

A dental image processing apparatus comprising generating an implant center line connecting the lingual cusp point of the set antagonist tooth and the central point of the alveolar bone.